20101011011 has 8 divisors (see below), whose sum is σ = 20304910704. Its totient is φ = 19897207200.

The previous prime is 20101010999. The next prime is 20101011013. The reversal of 20101011011 is 11011010102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20101011011 - 2¹⁸ = 20100748867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20101011011.

It is not an unprimeable number, because it can be changed into a prime (20101011013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443285 + ... + 486521.

It is an arithmetic number, because the mean of its divisors is an integer number (2538113838).

Almost surely, 2^20101011011 is an apocalyptic number.

20101011011 is a deficient number, since it is larger than the sum of its proper divisors (203899693).

20101011011 is a wasteful number, since it uses less digits than its factorization.

20101011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47941.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 20101011011 its reverse (11011010102), we get a palindrome (31112021113).

Subtracting from 20101011011 its reverse (11011010102), we obtain a palindrome (9090000909).

The spelling of 20101011011 in words is "twenty billion, one hundred one million, eleven thousand, eleven".